Electric switch



Sept. 11, 1928. 7 1,684,016

w. N. DUNN ELECTRIC SWITCH Filed Nov. 16. 1922 2 Sheets-Sheet 1 w i A? \Qfiquenihff Sept. 11, 1928.

W. N. DUNN ELECTRIC SWITCH Filed Nov. 16. 1922 2 Sheets-Sheet 2 Patented Sept. 11, 1928.

UNITED STATES PATENT OFFICE.

WILLIAM N. DUNN, OF MEDFORD, IVIASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO CONDIT ELECTRICAL MANUFACTURING CORPORATION, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

ELEGTBiC SWITCH.

Application filed November 16, 1922. Serial No. 601,256.

This invention relates to electric switches and has for an object to provide a cell or truck-type switch with means by which the oil receptacle'may be removed from enclosing relation with the contact members of the switch whereby to permit of the inspection of said contact members.

Another object of the invention is to provide a truck type switch with means by which the switch members and supporting frame therefor may be elevated above the truck carriage.

A further object is to provide means by which a wall or frame supported electric switch may be converted into a truck type switch.

A yet further object is generally to improve the construction and operation of electric switches.

V Fig. 1 is aside elevation} of an electric switch embodying the invention.

Fig. 2 is a plan view of Fig. 1 with the operating mechanism removed.

Fig. 3 is a side elevation of the switch with the switch frame supported in elevated position above the truck carriage.

Fig. a is a plan view of the truck carriage taken along line 4- 1: of Fig. 3.

As here shown, the switch embodying the invention may include a switch frame 10 and the oil receptacle 11, whichlatter may be secured removably to the switch frame by'resilient means including the supporting rods 12 and springs'13.

Said switch is adapted to be carried by and supported above a truck carriage which may include the base comprising the side rails 14 and end cross-members 15 and 16. Axles 17 and 13 may be journalled in said side rails 14k and have wheels 19 fixed thereto and on which the carriage is movable.

The carriage may be of any suitable or desirable shape and construction.

A tubular guide-member 20 is or may be fixed in vertical position to the rear crossmember 16 of the truck carriage and two similar tubular guide-members 21 may be secured in vertically-spaced relation to the front cross-member 15. Said tubular guidemembers 20 and 21 may be secured to the carriage in any suitable manner as for instance, the lower ends of said guide-memhere may be arranged in screw-threaded engagement with the cross-members 15. and

16 of the carriage.

A guide rod 25 of suitable length is slidably received in said rear tubular guidemember 20 and similar rods 26 are received I slidably in the front tubular guide-members An L-shaped member 27 is fixed to the upperend'of said rod 25 by suitable means which. may include the bolts 28; and said L-shaped member is also secured preferably removably, to the switch frame 10 by suitable means as the bolts 29.

A connecting-member 30 is extended between and secured to the upper ends of said front rods 26 and said member is preferably removably secured to the switch frame by suitable means as the bolts 31. Said rods 25' and 26 are or may be provided with a series of holes 32 therethrough arranged along the length of the rods and pins 33 or other suitable means are adapted to be received in said holes and engage the upper ends of said tubular guide-members 20 and 21 whereby to hold the switch in raised position'above the carriage as shown in Figs. 3 and 4;, in which position the oil receptacle 11 maybe lowered from the switch frame 10 whereby to permit inspection of the contact members. i

The switch may be removed from the carriage by raising it sufficiently to permit the rods 25 and 26 to be withdrawn from said tubular guide-members 20 and 21.

WVhen the switch is removed from the carriage the switch may be supported on a floor by the rods 25 and 26. y

The switch operating mechanism includes the lever- 10 which carries a movable switch 1 of said electrically-actuated mechanism 45. Said lever 48 is connected to the lever 41 by a link 50 which is pivoted to both levers and extends through a passage 4-1 in the connecting-member 30. The electrically actuated mechanism serves to control the switch in a more or less customary manner. The switch may be raised above the carriage in any suitable manner; for instance, a jack may be used to raise the switch. The guide-members are disposed beyond opposite sides of the oil receptacle whereby to permit said receptacle to be lowered and removed from the carriage.

The structure may be otherwise modified without departing from the spirit of the invention.

I claim:

1. The combination of an electric switch comprising a switch frame and an oil receptacle depending therefrom, a carriage, supporting and guiding means connecting said switch frame and carriage arranged to guide the switch for vertical movement above said carriage, and means to connect said oil receptacle removably with said switch frame.

2. The combination of an electric switch comprising a switch frame and an oil receptacle depending therefrom, a carriage, supporting and guiding means connecting said switch frame and carriage and disposed beyond opposite ends of said oil receptacle and arranged to guidethe switch for vertical movement above said carriage, and means to connect said oil receptacle removably with said switch frame.

3. An electric. switch having a switch frame provided with depending guideextensions,'and a carriage disposed beneath said frame having upwardly-extended tubular guide-members. in which said guideextensions are slidably received.

4. An electric switch having a switch frame provided with I removable depending guide-extensions, and a carriage disposed beneath said frame having upwardly extended tubular guide-members in which said guidcextensions are slidably received.

5. The combination of an electric switch comprising a switch frame having depending guide-extensions, a carriage having upwardly-extended tubular guide-members in which said guide-extensions are slidably rec'eived, and an oil receptacle dependingly connected removably to said switch frame and disposed between said guide-extensions and guide-members.

6. The combination of a carriage having upwardly-extended tubular guide-members, rods slidably received in said guide-members means disposed at the upper ends of said rods arranged to engage an electric switch, and means including 'a connecting-member connecting two of said rods, and an electric switch secured to said means and rods.

7. The combination of a carriage having upwardly-extended tubular guide-members, rods slidably received in said guide1ne1nbers, means disposed at the upper ends of said rods arranged to engage an electric switch, said means including a connectingmember connecting two of said rods, an electric switch including a switch frame secured to said means, switch operating mechanism disposed above said frame, and electrically actuated mechanism carried by said switch frame including a lever pivoted below said electrically-actuated mechanism and connecting-member, and a link extended through a passage in said connecting member and connected with said lever and switch operating mechanism and disposed between the rods connected with said connecting member.

8. A movable switch unit comprising the combination of a base having supporting wheels journalled thereon, a switch frame disposed above said base, frame-supporting means extended between said base and frame, and an oil receptacle yieldingly depending from said frame and saacec above said base whereby to admit o the unrestricted yielding movement of thereceptacle.

9. An electricswitch having the combination of a platform, a switch-frame disposed above said platform, an oil receptacle car ried by and depending beneath said switchframe, and supporting means connecting said switch-frame and platform, said supporting means having provision for normally supporting said frame with the oil receptacle relatively closely spaced above said platform and havingextensible members arranged to support said frame with the oil receptacle relatively widely spaced above said platform. 1

In testimony whereof, I have signed my name to this specification.

WILLIAM N. DUNN. 

